I just upgraded from gtx 980 ACX 2.0 to gtx 980 ti and after around 15 seconds of gameplay on witcher 3 (everything on ultra settings) i noticed my gpu was 81 degrees celsius and seemed to be climbing... What is going on? Do i need to get a cooler for my gpu? I have 5 case fans and a swiftech h240x. Any help would be greatly appreciated! Thank you!